formally◼◼◼(in a formal manner) adverb [UK: ˈfɔːm.l̩.i] [US: ˈfɔːrm.l̩.i]I don't believe we've been formally introduced. = Je ne crois pas que nous ayons été formellement présentés.
informellementadverbe
informally◼◼◼(in an informal manner) adverb [UK: ɪn.ˈfɔː.mə.li] [US: ˌɪn.ˈfɔːr.mə.li]